Service delivery in post-apartheid South Africa has become a topical
issue both in the academia and the political arena . The rise of social
movements, the xenophobic tensions of May 2008 and protest actions could
be ...

In this thesis we studied convection and cross-diffusion effects in porous media.
Fluid flow in different flow geometries was investigated and the equations for momentum, heat and mass transfer transformed into a system ...

We introduce the notion of differential sequences generated by generators of sequences. We discuss the Riccati sequence in terms of symmetry analysis,
singularity analysis and identification of the complete symmetry group ...

In this thesis we study spherically symmetric spacetimes with a perfect fluid source
which incorporates charge. We seek explicit solutions to the Einstein- Maxwell system
of equations. For nonaccelerating spherically ...